Home
Class 10
MATHS
The sum of first n terms of an AP is 3n^...

The sum of first n terms of an AP is `3n^(2) + 4n`. Find:
a] `a_(25)`
b] `a_(10)`

Text Solution

Verified by Experts

The correct Answer is:
a] `= 151`
b] `= 61`.
Promotional Banner

Topper's Solved these Questions

  • ARITHMETIC PROGRESSIONS

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS (LONG-ANSWER [LA] TYPE - QUESTIONS)|14 Videos

  • ARITHMETIC PROGRESSIONS

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS (HOTS [HIGHER ORDER THINKING SKILLS] - QUESTIONS)|4 Videos

  • ARITHMETIC PROGRESSIONS

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS (SHORT-ANSWER [SA] TYPE 1 - QUESTIONS)|24 Videos

  • AREA RELATED TO CIRCLES

    ZEN PUBLICATION|Exercise ADDITIONAL QUESTIONS (HIGHER ORDER THINKING SKILLS)|7 Videos

  • CIRCLES

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS ( HOT [HIGHER ORDER THINKING SKILLS] - QUESTIONS) (IIT AND IMO)|9 Videos

Similar Questions

Explore conceptually related problems

If the sum of first n terms of an A.P. is cn^(2) , then the sum of squares of these n terms is :

Find the sum of first 20 terms of an AP whose nth term is a_(n) = 2-3n .

The sum of first 7 terms of an AP is 63 and the sum of next 7 terms is 161. Find a_(28) .

If the sum of the first n terms of an A.P. is 4n-n^(2) what is the first term? What is the sum of the first two terms? What is the second term? Find the 3rd, 10th, and the nth terms.

If the sum of the first n^(th) terms of an A.P is 4n-n^(2) , what is the first term (that is S_(1) ) ? What is the sum of first two terms? What is the second term? Similarly, find the 3^(rd) , the 10^(th) and the n^(th) terms.

If the sum of the first n terms of an AP is 4n-n^(2) , what is the first term (note that the first term is S_(1) )? What is the sum of first two terms? What is the second term? Similarly, find the 3rd, the 10th and the nth terms

Write the first 4 terms of an A.P. Where a_(n) = 4n +3 .

IF the sum of the first n terms of an AP is 4n-n^2 , what is the first term (that is S_1 )? What is the sum of first two terms? What is the second term? Similarly, find the 3rd the 10th and the nth terms?

The sum of the n terms of an AP is 2n^(2)+5n and its common difference is 6, then its first term is

The sum of first 2n terms of an AP is alpha . and the sum of next n terms is beta, its common difference is